Sash operating mechanism



April 24, 1934. w, F. CANAVAN 1,956,269

SASH OPERATING MECHANISM Filed May 2 Sheets-She9t 1 ATTOA /VEX Patented Apr. 24, 1934 SASH OPERATING MECHANISM William Frederic Canavan, Montreal, Quebec, Canada Application May 30, 1930, Serial No. 457,557

8 Claims.

The invention relates to a sash operating mechanism, as described in the present specification and illustrated in the accompanying drawings that form part of the same.

? The invention consists essentially of the introduction of a cushioning device in the operating rods and levers as pointed out in the claims for novelty following a description in detail of the parts making up this invention.

The objects of the invention are to facilitate the opening and closing operations without endangering the constructional features of the windew and provide for elevators and factories, especially those places where dust explosions are liable to occur, a reliable mechanism-that will be operable instantly on any undue pressure from within.

In the drawings, Figure 1 is a perspective view of the operating mechanism apart from the sash. Figure 2 is a side elevational view of the operating mechanism showing the sash pivoted to the frame and in its mid-open position.

Figure 3 is a side elevational view of the sash and operating parts showing the sash in its closed position.

Figure 4 is a fragmentary detail of the sash operating bars showing the stop pin and friction adjusting device.

Figure 5 is a rear elevational view of the sash 80 andwindow frame showing the mechanism attached thereto.

Figure 6 is a front elevational view of the sash and frame showing the operating mechanism.

Figure '7 is a fragmentary detail of the bracket supporting the operating bars.

Figure 8 is a detail showing the three positions of the cushion spring member. I

Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawings, the sash is indicated by the numeral 15, this sash being pivotally supported adjacent to the upper end by the pivot 16 Within the window case 1'7, the stop flanges projecting from the upper and lower ends on oppo- $5 site sides and indicated by the numerals 18 and The main operating bars 20 are inwardly turned at their lower ends 21 and are pivotally secured in the bracket 22 by the pivot rod 23, this bracket 550 in turn being secured to a middle horizontal sash bar 24, the intermediate bolt 25 extending across the bars 20 spacing and holding said bars intermediately and having the nut 26 on one end and the spring 27 against the head of the bolt at the 5 other end between said head and bar 20, thus at as the strut bars.

the intermediate point referred to, resiliently drawing the bars towards one another according to the adjusted pressure of the spring 27 The operating bars 20 are pivotally joined from their upper ends by the link bars 28 to the lug 29 00 projecting from the stop flange 18 of the sash and together forming an operating frame. Therefore any pull on the pivot joint of said links and said bars will immediately affect the position of the sash and throw it outwardly on the pivot 16 and particularly to the pivot pin 30.

The cushioning device may be said to be continuously between the operating bars and the sash in all positions of the latter and this cushioning device is supported from one of its own members, indicated by the numeral 31 and herein described These strut bars are pivotally secured to the lugs 32 rigid with the window case 17, and extend upwardly and are secured to the connecting parallel rods 33 of the cushioning frame which at their lower end portions 34 and 35 are spread and pivotally secured to the vertical sash bars 36 and 3'7.

The spring link 38 pivotally joins the parallel bars 33 to the pivot 30 and as the strut bars31 are pivotally secured to the parallel bars 33 intermediate of the length of these bars and towards the pivotal joining thereof with the spring link 38, the sash in its open position will always be spring-held by the strut bars 31 in all its positions in the Window case, the extent and the stiifness of this cushioning being determined by the position of the cushion itself, as the plunger 40 reciprocates within the case 39 and draws outwardly and pushes inwardlythe spring 41. This is particularly illustrated in Figure 8 of the drawings.

The chain 43 is secured at one end 44 to the pivotal joint of the operating bars 20 and link bars 28 and at its other end 45 to the pivotal joint 23 of the said operating bars 20 and bracket 5 22.

The sash is operated by pulling a chain 43 which swings the sash on its pivots 16 and coincidently the struts 31 are swung outwardly on their lower pivotal support.

In the inner position of these struts, they exert an outward pressure on the flange 18, but when these same struts are swung outwardly over their own vertical center, they exert an inward pres- 5 sure on the flange 18 through the spring links 38 w and this facilitates the opening of the sash, as well as cushioning it in its open position.

In the event of an explosion the sash cannot go beyond 90 degrees or even as far as that, for the bolt or pin 25 then strikes the parallel bars which will form a very effective stop.

The means for frictionally holding the operating bars is very useful indeed, and this is all accomplished by the spring being adjusted to the pressure so that the parallel bars of the cushioning device shall be brought into fairly stiff contact with these operating bars and the window cannot'fly open with impunity or close too readily.

What I claim is:

1. In a sash operating mechanism, an operating frame of angular form and projecting from the sash, a cushioning frame formed of a spring section and connecting rods pivotally secured at one end to the sash and at the other end to said spring section and strut bars pivotally secured to a window case below the sash and to said connecting rods intermediate of their length and swinging outwardly and inwardly and coincidently compressing and extending the spring of said spring section.

2. In a sash operating mechanism, an operating frame formed of parallel bars secured to the sash at its upper end and intermediately of the height of said sash and spaced by pivot mountings, a cushioning frame formed of a spring section and connecting rods pivotally secured at one end to the sash and at the other end to said spring section, and strut bars pivotally secured to a window case below the sash and to said connecting rods intermediate of their length and swinging outwardly and inwardly and coincidently compressing and extending the spring of said spring section.

3. In a sash operating mechanism, an operating frame formed of an upper section of spaced parallel bars secured to a pivot mounting rigid with the sash at the upper end thereof and a lower section of spaced parallel bars angularly arranged in relation to the aforesaid parallel bars and secured thereto by a pivot at the angle and to the sash towards the lower front thereof, a cushioning frame formed of a spring section and connecting rods pivotally secured at one end to the sash and at the other end to said spring section, and strut bars pivotally secured to a window case below the sash and to said connecting rods intermediate of their length and swinging out wardly and inwardly and coincidently compressing and extending the spring of said spring section.

4. In a sash operating mechanism, an operating frame formed of an upper section of spaced parallel bars secured to a pivot mounting rigid with the sash at the upper end thereof and a lower section of spaced parallel bars angularly arranged in relation to the aforesaid parallel bars and secured thereto by a pivot at the angle and to the sash towards the lower front thereof,

and having a stop there across and rigid with the bars, a cushioning frame formed of a spring section and connecting rods pivotally secured at one end to the sash and at the other end to said spring section, and. strut bars pivotally secured to a window case below the sash and to said connecting rods intermediate of their length and swinging outwardly and inwardly and coincidently compressing and extending the spring of said spring section.

5. In a sash operating mechanism, an operating frame of angular form and projecting from the sash, a looped chain secured to said bars at the angle and to the lower joint at the sash, a cushioning frame formed of a spring section and connecting rods pivotally secured at one end to the sash and at the other end to said spring section and strut bars pivotally secured to a window case below the sash and to said connecting rods intermediate of their length and swinging outwardly and inwardly and coincidently compressing and extending the spring of said spring section.

6. In a sash operating mechanism, an operating frame of angular form and projecting from the sash, a cushioning frame formed of an encased spring having the case secured to the upper end of the sash and the spring secured to the case and connecting rods secured to the sash lower down and at their outer ends to said spring and strut bars pivotally secured to a window case below the sash and to said connecting rods intermediate of their length and swinging outwardly and inwardly and coincidently compressing and extending the spring of said spring section.

'7. In a sash operating mechanism, an operating frame formed of sections of spaced parallel bars and having pivot mountings for joining sections and holding the frame to the sash, a cushioning frame formed of spring and rod sections, strut bars supporting said sash through said cushioning frame and frictionauy engaging said parallel bars, and adjusting means intermediately of the parallel bars for increasing or diminishing the friction.

8. A sash operating device, comprising an operating frame having spaced parallel bars and a stop pin having a head and a helical spring between said head and a parallel bar, and a nut on the other end of the pin beyond the other parallel bar, adapted to draw said bars towards one another, a cushioning frame containing a spring adapted to be compressed at each operation and strut bars pivotally secured to said cushioning frame and to a window case containing the sash and engaging said parallel bars for braking purposes.

WILLIAM FREDERIC CANAVAN.

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